Ingest Pipelines UI should indicate managed pipelines and allow filtering

[joshdover]

In elastic/elasticsearch#75905 Elasticsearch added support for _meta on ingest pipelines and in #119380 Fleet started appending _meta to all ingest pipelines to indicate they were managed by Fleet.

In order to provide consistency with index and component templates, we should update the Ingest Pipeline UI to add:

• A Managed label to pipelines with the managed: true metadata field
• A filter for hiding managed pipelines from the table

Index template UI we want to match

Existing ingest pipeline UI

Here's a sample of the metadata added by Fleet to our ingest pipelines:

"_meta" : {
  "package" : {
    "name" : "system"
  },
  "managed_by" : "fleet",
  "managed" : true
},

[elasticmachine]

Pinging @elastic/platform-deployment-management (Team:Deployment Management)

[joshdover]

cc @akshay-saraswat

[ruflin]

I filed #134883 as a related issue to provide a full experience around the data stream naming scheme and all the assets around it.